Basic Velocity Check

We seem to have an issue with some users browsers (internet exploder) submitting multiple requests at once. So I added this simple velocity check, do you guys have any suggestions?

I made the resolution in days just to play it safe. Typically these "inspections" are only ordered once every 3-6 years.


   * check to make sure that this inspection request is not being spammed


   * @param type $form 


  private function velocityCheck($form)


    return !Inspection::model()->exists('lastName=:lastName AND addressOne=:addressOne AND type=:type AND TO_DAYS(dateAdded) != TO_DAYS(NOW())', array(